前言热横轧工艺作为锻制自行车踏脚曲柄生产线的一个环节,直至最近才得到应用。自行车曲柄的一端有一个大的凸起部,这个一湍成凸起的曲柄毛坯是将含碳量为0.4%的园料钢先滚轧,然后单次锻压而成,材料的利用率为88%。 Introduction Hot cross-rolling technology as a forged bicycle pedal crank production line has been applied until recently. One end of the bicycle crank has a large boss, this a turbulent convex crank blank is 0.4% carbon content of the garden steel roll first, and then a single forging, the material utilization rate of 88 %.